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Finding the Fourth Proportional to 19,980.48, 29,961.60 and 7,490.88

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Solution

The fourth proportional to 19,980.48, 29,961.60 and 7,490.88 is: 11,232.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.48 : 29,961.60 = 7,490.88 : x
  2. Step 2: Convert to fraction form
    19,980.48/29,961.60 = 7,490.88/x
  3. Step 3: Cross multiply
    19,980.48x = 29,961.60 × 7,490.88
  4. Step 4: Simplify right side
    19,980.48x = 224,438,750.21
  5. Step 5: Solve for x
    x = 224,438,750.21/19,980.48
  6. Step 6: Final answer
    x = 11,232.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.